/*
 * Copyright (C), 2013, 上海汽车集团股份有限公司
 * FileName: PreparedStatementWrapper.java
 * Author:   12010065
 * Date:     2013年10月9日 下午2:03:55
 * Description: //模块目的、功能描述
 * History: //修改记录
 * <author>      <time>      <version>    <desc>
 * 修改人姓名             修改时间            版本号                  描述
 */
package com.ibm.framework.rws.wrapper;

import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.net.URL;
import java.sql.Array;
import java.sql.BatchUpdateException;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.Date;
import java.sql.NClob;
import java.sql.ParameterMetaData;
import java.sql.PreparedStatement;
import java.sql.Ref;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.RowId;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;

/**
 * SQL查询包装器
 * 
 * @author v_
 * 
 */
public class PreparedStatementWrapper implements PreparedStatement {

    /**
     * 用于执行SQL查询的API
     */
    private PreparedStatement currentPreparedStatement;

    /**
     * 构造方法
     * 
     * @param currentPreparedStatement 当前currentPreparedStatement
     */
    public PreparedStatementWrapper(PreparedStatement currentPreparedStatement) {
        super();
        this.currentPreparedStatement = currentPreparedStatement;
    }

    /**
     * Executes the given SQL statement, which returns a single <code>ResultSet</code> object.
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql an SQL statement to be sent to the database, typically a static SQL <code>SELECT</code> statement
     * @return a <code>ResultSet</code> object that contains the data produced by the given query; never
     *         <code>null</code>
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the given SQL statement produces anything other than a single
     *                <code>ResultSet</code> object, the method is called on a <code>PreparedStatement</code> or
     *                <code>CallableStatement</code>
     */
    public ResultSet executeQuery(String sql) throws SQLException {
        return currentPreparedStatement.executeQuery(sql);
    }

    /**
     * Executes the given SQL statement, which may be an <code>INSERT</code>, <code>UPDATE</code>, or
     * <code>DELETE</code> statement or an SQL statement that returns nothing, such as an SQL DDL statement.
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
     *            <code>DELETE</code>; or an SQL statement that returns nothing, such as a DDL statement.
     * 
     * @return either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements
     *         that return nothing
     * 
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the given SQL statement produces a <code>ResultSet</code> object, the
     *                method is called on a <code>PreparedStatement</code> or <code>CallableStatement</code>
     */
    public int executeUpdate(String sql) throws SQLException {
        return currentPreparedStatement.executeUpdate(sql);
    }

    /**
     * Releases this <code>Statement</code> object's database and JDBC resources immediately instead of waiting for this
     * to happen when it is automatically closed. It is generally good practice to release resources as soon as you are
     * finished with them to avoid tying up database resources.
     * <P>
     * Calling the method <code>close</code> on a <code>Statement</code> object that is already closed has no effect.
     * <P>
     * <B>Note:</B>When a <code>Statement</code> object is closed, its current <code>ResultSet</code> object, if one
     * exists, is also closed.
     * 
     * @exception SQLException if a database access error occurs
     */
    public void close() throws SQLException {
        currentPreparedStatement.close();
    }

    /**
     * Retrieves the maximum number of bytes that can be returned for character and binary column values in a
     * <code>ResultSet</code> object produced by this <code>Statement</code> object. This limit applies only to
     * <code>BINARY</code>, <code>VARBINARY</code>, <code>LONGVARBINARY</code>, <code>CHAR</code>, <code>VARCHAR</code>,
     * <code>NCHAR</code>, <code>NVARCHAR</code>, <code>LONGNVARCHAR</code> and <code>LONGVARCHAR</code> columns. If the
     * limit is exceeded, the excess data is silently discarded.
     * 
     * @return the current column size limit for columns storing character and binary values; zero means there is no
     *         limit
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #setMaxFieldSize
     */
    public int getMaxFieldSize() throws SQLException {
        return currentPreparedStatement.getMaxFieldSize();
    }

    /**
     * Sets the limit for the maximum number of bytes that can be returned for character and binary column values in a
     * <code>ResultSet</code> object produced by this <code>Statement</code> object.
     * 
     * This limit applies only to <code>BINARY</code>, <code>VARBINARY</code>, <code>LONGVARBINARY</code>,
     * <code>CHAR</code>, <code>VARCHAR</code>, <code>NCHAR</code>, <code>NVARCHAR</code>, <code>LONGNVARCHAR</code> and
     * <code>LONGVARCHAR</code> fields. If the limit is exceeded, the excess data is silently discarded. For maximum
     * portability, use values greater than 256.
     * 
     * @param max the new column size limit in bytes; zero means there is no limit
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code> or the condition max >= 0 is not satisfied
     * @see #getMaxFieldSize
     */
    public void setMaxFieldSize(int max) throws SQLException {
        currentPreparedStatement.setMaxFieldSize(max);
    }

    /**
     * Retrieves the maximum number of rows that a <code>ResultSet</code> object produced by this <code>Statement</code>
     * object can contain. If this limit is exceeded, the excess rows are silently dropped.
     * 
     * @return the current maximum number of rows for a <code>ResultSet</code> object produced by this
     *         <code>Statement</code> object; zero means there is no limit
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #setMaxRows
     */
    public int getMaxRows() throws SQLException {
        return currentPreparedStatement.getMaxRows();
    }

    /**
     * Retrieves the maximum number of rows that a <code>ResultSet</code> object produced by this <code>Statement</code>
     * object can contain. If this limit is exceeded, the excess rows are silently dropped.
     * 
     * @param max max
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #setMaxRows
     */
    public void setMaxRows(int max) throws SQLException {
        currentPreparedStatement.setMaxRows(max);
    }

    /**
     * Sets escape processing on or off. If escape scanning is on (the default), the driver will do escape substitution
     * before sending the SQL statement to the database.
     * 
     * Note: Since prepared statements have usually been parsed prior to making this call, disabling escape processing
     * for <code>PreparedStatements</code> objects will have no effect.
     * 
     * @param enable <code>true</code> to enable escape processing; <code>false</code> to disable it
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     */
    public void setEscapeProcessing(boolean enable) throws SQLException {
        currentPreparedStatement.setEscapeProcessing(enable);
    }

    /**
     * Retrieves the number of seconds the driver will wait for a <code>Statement</code> object to execute. If the limit
     * is exceeded, a <code>SQLException</code> is thrown.
     * 
     * @return the current query timeout limit in seconds; zero means there is no limit
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #setQueryTimeout
     */
    public int getQueryTimeout() throws SQLException {
        return currentPreparedStatement.getQueryTimeout();
    }

    /**
     * Retrieves the number of seconds the driver will wait for a <code>Statement</code> object to execute. If the limit
     * is exceeded, a <code>SQLException</code> is thrown.
     * 
     * @param seconds seconds
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #setQueryTimeout
     */
    public void setQueryTimeout(int seconds) throws SQLException {
        currentPreparedStatement.getQueryTimeout();
    }

    /**
     * Cancels this <code>Statement</code> object if both the DBMS and driver support aborting an SQL statement. This
     * method can be used by one thread to cancel a statement that is being executed by another thread.
     * 
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     */
    public void cancel() throws SQLException {
        currentPreparedStatement.cancel();
    }

    /**
     * Retrieves the first warning reported by calls on this <code>Statement</code> object. Subsequent
     * <code>Statement</code> object warnings will be chained to this <code>SQLWarning</code> object.
     * 
     * <p>
     * The warning chain is automatically cleared each time a statement is (re)executed. This method may not be called
     * on a closed <code>Statement</code> object; doing so will cause an <code>SQLException</code> to be thrown.
     * 
     * <P>
     * <B>Note:</B> If you are processing a <code>ResultSet</code> object, any warnings associated with reads on that
     * <code>ResultSet</code> object will be chained on it rather than on the <code>Statement</code> object that
     * produced it.
     * 
     * @return the first <code>SQLWarning</code> object or <code>null</code> if there are no warnings
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     */
    public SQLWarning getWarnings() throws SQLException {
        return currentPreparedStatement.getWarnings();
    }

    /**
     * Clears all the warnings reported on this <code>Statement</code> object. After a call to this method, the method
     * <code>getWarnings</code> will return <code>null</code> until a new warning is reported for this
     * <code>Statement</code> object.
     * 
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     */
    public void clearWarnings() throws SQLException {
        currentPreparedStatement.clearWarnings();
    }

    /**
     * Sets the SQL cursor name to the given <code>String</code>, which will be used by subsequent
     * <code>Statement</code> object <code>execute</code> methods. This name can then be used in SQL positioned update
     * or delete statements to identify the current row in the <code>ResultSet</code> object generated by this
     * statement. If the database does not support positioned update/delete, this method is a noop. To insure that a
     * cursor has the proper isolation level to support updates, the cursor's <code>SELECT</code> statement should have
     * the form <code>SELECT FOR UPDATE</code>. If <code>FOR UPDATE</code> is not present, positioned updates may fail.
     * 
     * <P>
     * <B>Note:</B> By definition, the execution of positioned updates and deletes must be done by a different
     * <code>Statement</code> object than the one that generated the <code>ResultSet</code> object being used for
     * positioning. Also, cursor names must be unique within a connection.
     * 
     * @param name the new cursor name, which must be unique within a connection
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     */
    public void setCursorName(String name) throws SQLException {
        currentPreparedStatement.setCursorName(name);
    }

    /**
     * Executes the given SQL statement, which may return multiple results. In some (uncommon) situations, a single SQL
     * statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1)
     * executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an
     * unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the form of the first result. You must
     * then use the methods <code>getResultSet</code> or <code>getUpdateCount</code> to retrieve the result, and
     * <code>getMoreResults</code> to move to any subsequent result(s).
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql any SQL statement
     * @return <code>true</code> if the first result is a <code>ResultSet</code> object; <code>false</code> if it is an
     *         update count or there are no results
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the method is called on a <code>PreparedStatement</code> or
     *                <code>CallableStatement</code>
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     */
    public boolean execute(String sql) throws SQLException {
        return currentPreparedStatement.execute(sql);
    }

    /**
     * Retrieves the current result as a <code>ResultSet</code> object. This method should be called only once per
     * result.
     * 
     * @return the current result as a <code>ResultSet</code> object or <code>null</code> if the result is an update
     *         count or there are no more results
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #execute
     */
    public ResultSet getResultSet() throws SQLException {
        return currentPreparedStatement.getResultSet();
    }

    /**
     * Retrieves the current result as an update count; if the result is a <code>ResultSet</code> object or there are no
     * more results, -1 is returned. This method should be called only once per result.
     * 
     * @return the current result as an update count; -1 if the current result is a <code>ResultSet</code> object or
     *         there are no more results
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #execute
     */
    public int getUpdateCount() throws SQLException {
        return currentPreparedStatement.getUpdateCount();
    }

    /**
     * Moves to this <code>Statement</code> object's next result, returns <code>true</code> if it is a
     * <code>ResultSet</code> object, and implicitly closes any current <code>ResultSet</code> object(s) obtained with
     * the method <code>getResultSet</code>.
     * 
     * <P>
     * There are no more results when the following is true:
     * 
     * <PRE>
     * // stmt is a Statement object
     * ((stmt.getMoreResults() == false) &amp;&amp; (stmt.getUpdateCount() == -1))
     * </PRE>
     * 
     * @return <code>true</code> if the next result is a <code>ResultSet</code> object; <code>false</code> if it is an
     *         update count or there are no more results
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #execute
     */
    public boolean getMoreResults() throws SQLException {
        return currentPreparedStatement.getMoreResults();
    }

    /**
     * Gives the driver a hint as to the direction in which rows will be processed in <code>ResultSet</code> objects
     * created using this <code>Statement</code> object. The default value is <code>ResultSet.FETCH_FORWARD</code>.
     * <P>
     * Note that this method sets the default fetch direction for result sets generated by this <code>Statement</code>
     * object. Each result set has its own methods for getting and setting its own fetch direction.
     * 
     * @param direction the initial direction for processing rows
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code> or the given direction is not one of <code>ResultSet.FETCH_FORWARD</code>,
     *                <code>ResultSet.FETCH_REVERSE</code>, or <code>ResultSet.FETCH_UNKNOWN</code>
     * @since 1.2
     * @see #getFetchDirection
     */
    public void setFetchDirection(int direction) throws SQLException {
        currentPreparedStatement.setFetchDirection(direction);
    }

    /**
     * Retrieves the direction for fetching rows from database tables that is the default for result sets generated from
     * this <code>Statement</code> object. If this <code>Statement</code> object has not set a fetch direction by
     * calling the method <code>setFetchDirection</code>, the return value is implementation-specific.
     * 
     * @return the default fetch direction for result sets generated from this <code>Statement</code> object
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @since 1.2
     * @see #setFetchDirection
     */
    public int getFetchDirection() throws SQLException {
        return currentPreparedStatement.getFetchDirection();
    }

    /**
     * Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are
     * needed for <code>ResultSet</code> objects genrated by this <code>Statement</code>. If the value specified is
     * zero, then the hint is ignored. The default value is zero.
     * 
     * @param rows the number of rows to fetch
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code> or the condition <code>rows >= 0</code> is not satisfied.
     * @since 1.2
     * @see #getFetchSize
     */
    public void setFetchSize(int rows) throws SQLException {
        currentPreparedStatement.setFetchSize(rows);
    }

    /**
     * Retrieves the number of result set rows that is the default fetch size for <code>ResultSet</code> objects
     * generated from this <code>Statement</code> object. If this <code>Statement</code> object has not set a fetch size
     * by calling the method <code>setFetchSize</code>, the return value is implementation-specific.
     * 
     * @return the default fetch size for result sets generated from this <code>Statement</code> object
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @since 1.2
     * @see #setFetchSize
     */
    public int getFetchSize() throws SQLException {
        return currentPreparedStatement.getFetchSize();
    }

    /**
     * Retrieves the result set concurrency for <code>ResultSet</code> objects generated by this <code>Statement</code>
     * object.
     * 
     * @return either <code>ResultSet.CONCUR_READ_ONLY</code> or <code>ResultSet.CONCUR_UPDATABLE</code>
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @since 1.2
     */
    public int getResultSetConcurrency() throws SQLException {
        return currentPreparedStatement.getResultSetConcurrency();
    }

    /**
     * Retrieves the result set type for <code>ResultSet</code> objects generated by this <code>Statement</code> object.
     * 
     * @return one of <code>ResultSet.TYPE_FORWARD_ONLY</code>, <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     *         <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @since 1.2
     */
    public int getResultSetType() throws SQLException {
        return currentPreparedStatement.getResultSetType();
    }

    /**
     * Adds the given SQL command to the current list of commmands for this <code>Statement</code> object. The commands
     * in this list can be executed as a batch by calling the method <code>executeBatch</code>.
     * <P>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql typically this is a SQL <code>INSERT</code> or <code>UPDATE</code> statement
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the driver does not support batch updates, the method is called on a
     *                <code>PreparedStatement</code> or <code>CallableStatement</code>
     * @see #executeBatch
     * @see DatabaseMetaData#supportsBatchUpdates
     * @since 1.2
     */
    public void addBatch(String sql) throws SQLException {
        currentPreparedStatement.addBatch(sql);
    }

    /**
     * Empties this <code>Statement</code> object's current list of SQL commands.
     * <P>
     * 
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code> or the driver does not support batch updates
     * @see #addBatch
     * @see DatabaseMetaData#supportsBatchUpdates
     * @since 1.2
     */
    public void clearBatch() throws SQLException {
        currentPreparedStatement.clearBatch();
    }

    /**
     * Submits a batch of commands to the database for execution and if all commands execute successfully, returns an
     * array of update counts. The <code>int</code> elements of the array that is returned are ordered to correspond to
     * the commands in the batch, which are ordered according to the order in which they were added to the batch. The
     * elements in the array returned by the method <code>executeBatch</code> may be one of the following:
     * <OL>
     * <LI>A number greater than or equal to zero -- indicates that the command was processed successfully and is an
     * update count giving the number of rows in the database that were affected by the command's execution
     * <LI>A value of <code>SUCCESS_NO_INFO</code> -- indicates that the command was processed successfully but that the
     * number of rows affected is unknown
     * <P>
     * If one of the commands in a batch update fails to execute properly, this method throws a
     * <code>BatchUpdateException</code>, and a JDBC driver may or may not continue to process the remaining commands in
     * the batch. However, the driver's behavior must be consistent with a particular DBMS, either always continuing to
     * process commands or never continuing to process commands. If the driver continues processing after a failure, the
     * array returned by the method <code>BatchUpdateException.getUpdateCounts</code> will contain as many elements as
     * there are commands in the batch, and at least one of the elements will be the following:
     * <P>
     * <LI>A value of <code>EXECUTE_FAILED</code> -- indicates that the command failed to execute successfully and
     * occurs only if a driver continues to process commands after a command fails
     * </OL>
     * <P>
     * The possible implementations and return values have been modified in the Java 2 SDK, Standard Edition, version
     * 1.3 to accommodate the option of continuing to proccess commands in a batch update after a
     * <code>BatchUpdateException</code> obejct has been thrown.
     * 
     * @return an array of update counts containing one element for each command in the batch. The elements of the array
     *         are ordered according to the order in which commands were added to the batch.
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code> or the driver does not support batch statements. Throws
     *                {@link BatchUpdateException} (a subclass of <code>SQLException</code>) if one of the commands sent
     *                to the database fails to execute properly or attempts to return a result set.
     * 
     * @see #addBatch
     * @see DatabaseMetaData#supportsBatchUpdates
     * @since 1.2
     */
    public int[] executeBatch() throws SQLException {
        return currentPreparedStatement.executeBatch();
    }

    /**
     * Retrieves the <code>Connection</code> object that produced this <code>Statement</code> object.
     * 
     * @return the connection that produced this statement
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @since 1.2
     */
    public Connection getConnection() throws SQLException {
        return new ConnectionWrapper(currentPreparedStatement.getConnection());
    }

    /**
     * Moves to this <code>Statement</code> object's next result, returns <code>true</code> if it is a
     * <code>ResultSet</code> object, and implicitly closes any current <code>ResultSet</code> object(s) obtained with
     * the method <code>getResultSet</code>.
     * 
     * <P>
     * There are no more results when the following is true:
     * 
     * <PRE>
     * // stmt is a Statement object
     * ((stmt.getMoreResults() == false) &amp;&amp; (stmt.getUpdateCount() == -1))
     * </PRE>
     * 
     * @param current current
     * @return <code>true</code> if the next result is a <code>ResultSet</code> object; <code>false</code> if it is an
     *         update count or there are no more results
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @see #execute
     */
    public boolean getMoreResults(int current) throws SQLException {
        return currentPreparedStatement.getMoreResults();
    }

    /**
     * Retrieves any auto-generated keys created as a result of executing this <code>Statement</code> object. If this
     * <code>Statement</code> object did not generate any keys, an empty <code>ResultSet</code> object is returned.
     * 
     * <p>
     * <B>Note:</B>If the columns which represent the auto-generated keys were not specified, the JDBC driver
     * implementation will determine the columns which best represent the auto-generated keys.
     * 
     * @return a <code>ResultSet</code> object containing the auto-generated key(s) generated by the execution of this
     *         <code>Statement</code> object
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * @since 1.4
     */
    public ResultSet getGeneratedKeys() throws SQLException {
        return currentPreparedStatement.getGeneratedKeys();
    }

    /**
     * Executes the SQL statement in this <code>PreparedStatement</code> object, which must be an SQL Data Manipulation
     * Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or <code>DELETE</code>; or an SQL
     * statement that returns nothing, such as a DDL statement.
     * 
     * @param sql sql
     * @param autoGeneratedKeys autoGeneratedKeys
     * @return either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements
     *         that return nothing
     * @exception SQLException if a database access error occurs; this method is called on a closed
     *                <code>PreparedStatement</code> or the SQL statement returns a <code>ResultSet</code> object
     */
    public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
        return currentPreparedStatement.executeUpdate();
    }

    /**
     * Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array
     * should be made available for retrieval. This array contains the indexes of the columns in the target table that
     * contain the auto-generated keys that should be made available. The driver will ignore the array if the SQL
     * statement is not an <code>INSERT</code> statement, or an SQL statement able to return auto-generated keys (the
     * list of such statements is vendor-specific).
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
     *            <code>DELETE</code>; or an SQL statement that returns nothing, such as a DDL statement.
     * 
     * @param columnIndexes an array of column indexes indicating the columns that should be returned from the inserted
     *            row
     * @return either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements
     *         that return nothing
     * 
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the SQL statement returns a <code>ResultSet</code> object,the second
     *                argument supplied to this method is not an <code>int</code> array whose elements are valid column
     *                indexes, the method is called on a <code>PreparedStatement</code> or
     *                <code>CallableStatement</code>
     * @since 1.4
     */
    public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
        return currentPreparedStatement.executeUpdate(sql, columnIndexes);
    }

    /**
     * Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array
     * should be made available for retrieval. This array contains the names of the columns in the target table that
     * contain the auto-generated keys that should be made available. The driver will ignore the array if the SQL
     * statement is not an <code>INSERT</code> statement, or an SQL statement able to return auto-generated keys (the
     * list of such statements is vendor-specific).
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
     *            <code>DELETE</code>; or an SQL statement that returns nothing, such as a DDL statement.
     * @param columnNames an array of the names of the columns that should be returned from the inserted row
     * @return either the row count for <code>INSERT</code>, <code>UPDATE</code> , or <code>DELETE</code> statements, or
     *         0 for SQL statements that return nothing
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the SQL statement returns a <code>ResultSet</code> object, the second
     *                argument supplied to this method is not a <code>String</code> array whose elements are valid
     *                column names, the method is called on a <code>PreparedStatement</code> or
     *                <code>CallableStatement</code>
     * @since 1.4
     */
    public int executeUpdate(String sql, String[] columnNames) throws SQLException {
        return currentPreparedStatement.executeUpdate(sql, columnNames);
    }

    /**
     * Executes the given SQL statement, which may return multiple results, and signals the driver that any
     * auto-generated keys should be made available for retrieval. The driver will ignore this signal if the SQL
     * statement is not an <code>INSERT</code> statement, or an SQL statement able to return auto-generated keys (the
     * list of such statements is vendor-specific).
     * <P>
     * In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts.
     * Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple
     * results or (2) you are dynamically executing an unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the form of the first result. You must
     * then use the methods <code>getResultSet</code> or <code>getUpdateCount</code> to retrieve the result, and
     * <code>getMoreResults</code> to move to any subsequent result(s).
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql any SQL statement
     * @param autoGeneratedKeys a constant indicating whether auto-generated keys should be made available for retrieval
     *            using the method <code>getGeneratedKeys</code>; one of the following constants:
     *            <code>Statement.RETURN_GENERATED_KEYS</code> or <code>Statement.NO_GENERATED_KEYS</code>
     * @return <code>true</code> if the first result is a <code>ResultSet</code> object; <code>false</code> if it is an
     *         update count or there are no results
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the second parameter supplied to this method is not
     *                <code>Statement.RETURN_GENERATED_KEYS</code> or <code>Statement.NO_GENERATED_KEYS</code>, the
     *                method is called on a <code>PreparedStatement</code> or <code>CallableStatement</code>
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     * @see #getGeneratedKeys
     * 
     * @since 1.4
     */
    public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
        return currentPreparedStatement.execute(sql, autoGeneratedKeys);
    }

    /**
     * Executes the given SQL statement, which may return multiple results, and signals the driver that the
     * auto-generated keys indicated in the given array should be made available for retrieval. This array contains the
     * indexes of the columns in the target table that contain the auto-generated keys that should be made available.
     * The driver will ignore the array if the SQL statement is not an <code>INSERT</code> statement, or an SQL
     * statement able to return auto-generated keys (the list of such statements is vendor-specific).
     * <P>
     * Under some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts.
     * Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple
     * results or (2) you are dynamically executing an unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the form of the first result. You must
     * then use the methods <code>getResultSet</code> or <code>getUpdateCount</code> to retrieve the result, and
     * <code>getMoreResults</code> to move to any subsequent result(s).
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql any SQL statement
     * @param columnIndexes an array of the indexes of the columns in the inserted row that should be made available for
     *            retrieval by a call to the method <code>getGeneratedKeys</code>
     * @return <code>true</code> if the first result is a <code>ResultSet</code> object; <code>false</code> if it is an
     *         update count or there are no results
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>, the elements in the <code>int</code> array passed to this method are not
     *                valid column indexes, the method is called on a <code>PreparedStatement</code> or
     *                <code>CallableStatement</code>
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     * 
     * @since 1.4
     */
    public boolean execute(String sql, int[] columnIndexes) throws SQLException {
        return currentPreparedStatement.execute(sql, columnIndexes);
    }

    /**
     * Executes the given SQL statement, which may return multiple results, and signals the driver that the
     * auto-generated keys indicated in the given array should be made available for retrieval. This array contains the
     * names of the columns in the target table that contain the auto-generated keys that should be made available. The
     * driver will ignore the array if the SQL statement is not an <code>INSERT</code> statement, or an SQL statement
     * able to return auto-generated keys (the list of such statements is vendor-specific).
     * <P>
     * In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts.
     * Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple
     * results or (2) you are dynamically executing an unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the form of the first result. You must
     * then use the methods <code>getResultSet</code> or <code>getUpdateCount</code> to retrieve the result, and
     * <code>getMoreResults</code> to move to any subsequent result(s).
     * <p>
     * <strong>Note:</strong>This method cannot be called on a <code>PreparedStatement</code> or
     * <code>CallableStatement</code>.
     * 
     * @param sql any SQL statement
     * @param columnNames an array of the names of the columns in the inserted row that should be made available for
     *            retrieval by a call to the method <code>getGeneratedKeys</code>
     * @return <code>true</code> if the next result is a <code>ResultSet</code> object; <code>false</code> if it is an
     *         update count or there are no more results
     * @exception SQLException if a database access error occurs, this method is called on a closed
     *                <code>Statement</code>,the elements of the <code>String</code> array passed to this method are not
     *                valid column names, the method is called on a <code>PreparedStatement</code> or
     *                <code>CallableStatement</code>
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     * @see #getGeneratedKeys
     * 
     * @since 1.4
     */
    public boolean execute(String sql, String[] columnNames) throws SQLException {
        return currentPreparedStatement.execute(sql, columnNames);
    }

    /**
     * Retrieves the result set holdability for <code>ResultSet</code> objects generated by this <code>Statement</code>
     * object.
     * 
     * @return either <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>Statement</code>
     * 
     * @since 1.4
     */
    public int getResultSetHoldability() throws SQLException {
        return currentPreparedStatement.getResultSetHoldability();
    }

    /**
     * Retrieves whether this <code>Statement</code> object has been closed. A <code>Statement</code> is closed if the
     * method close has been called on it, or if it is automatically closed.
     * 
     * @return true if this <code>Statement</code> object is closed; false if it is still open
     * @throws SQLException if a database access error occurs
     * @since 1.6
     */
    public boolean isClosed() throws SQLException {
        return currentPreparedStatement.isClosed();
    }

    /**
     * Requests that a <code>Statement</code> be pooled or not pooled. The value specified is a hint to the statement
     * pool implementation indicating whether the applicaiton wants the statement to be pooled. It is up to the
     * statement pool manager as to whether the hint is used.
     * <p>
     * The poolable value of a statement is applicable to both internal statement caches implemented by the driver and
     * external statement caches implemented by application servers and other applications.
     * <p>
     * By default, a <code>Statement</code> is not poolable when created, and a <code>PreparedStatement</code> and
     * <code>CallableStatement</code> are poolable when created.
     * <p>
     * 
     * @param poolable requests that the statement be pooled if true and that the statement not be pooled if false
     *            <p>
     * @throws SQLException if this method is called on a closed <code>Statement</code>
     *             <p>
     * @since 1.6
     */
    public void setPoolable(boolean poolable) throws SQLException {
        currentPreparedStatement.setPoolable(poolable);
    }

    /**
     * Returns a value indicating whether the <code>Statement</code> is poolable or not.
     * <p>
     * 
     * @return <code>true</code> if the <code>Statement</code> is poolable; <code>false</code> otherwise
     *         <p>
     * @throws SQLException if this method is called on a closed <code>Statement</code>
     *             <p>
     * @since 1.6
     *        <p>
     * @see java.sql.Statement#setPoolable(boolean) setPoolable(boolean)
     */
    public boolean isPoolable() throws SQLException {
        return currentPreparedStatement.isPoolable();
    }

    /**
     * Returns an object that implements the given interface to allow access to non-standard methods, or standard
     * methods not exposed by the proxy.
     * 
     * If the receiver implements the interface then the result is the receiver or a proxy for the receiver. If the
     * receiver is a wrapper and the wrapped object implements the interface then the result is the wrapped object or a
     * proxy for the wrapped object. Otherwise return the the result of calling <code>unwrap</code> recursively on the
     * wrapped object or a proxy for that result. If the receiver is not a wrapper and does not implement the interface,
     * then an <code>SQLException</code> is thrown.
     * 
     * @param iface A Class defining an interface that the result must implement.
     * @param <T> 泛型对象
     * @return an object that implements the interface. May be a proxy for the actual implementing object.
     * @throws SQLException If no object found that implements the interface
     * @since 1.6
     */
    public <T> T unwrap(Class<T> iface) throws SQLException {
        return currentPreparedStatement.unwrap(iface);
    }

    /**
     * Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an
     * object that does. Returns false otherwise. If this implements the interface then return true, else if this is a
     * wrapper then return the result of recursively calling <code>isWrapperFor</code> on the wrapped object. If this
     * does not implement the interface and is not a wrapper, return false. This method should be implemented as a
     * low-cost operation compared to <code>unwrap</code> so that callers can use this method to avoid expensive
     * <code>unwrap</code> calls that may fail. If this method returns true then calling <code>unwrap</code> with the
     * same argument should succeed.
     * 
     * @param iface a Class defining an interface.
     * @return true if this implements the interface or directly or indirectly wraps an object that does.
     * @throws SQLException if an error occurs while determining whether this is a wrapper for an object with
     *             the given interface.
     * @since 1.6
     */
    public boolean isWrapperFor(Class<?> iface) throws SQLException {
        return currentPreparedStatement.isWrapperFor(iface);
    }

    /**
     * Executes the SQL query in this <code>PreparedStatement</code> object and returns the <code>ResultSet</code>
     * object generated by the query.
     * 
     * @return a <code>ResultSet</code> object that contains the data produced by the query; never <code>null</code>
     * @exception SQLException if a database access error occurs; this method is called on a closed
     *                <code>PreparedStatement</code> or the SQL statement does not return a <code>ResultSet</code>
     *                object
     */
    public ResultSet executeQuery() throws SQLException {
        return currentPreparedStatement.executeQuery();
    }

    /**
     * Executes the SQL statement in this <code>PreparedStatement</code> object, which must be an SQL Data Manipulation
     * Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or <code>DELETE</code>; or an SQL
     * statement that returns nothing, such as a DDL statement.
     * 
     * @return either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements
     *         that return nothing
     * @exception SQLException if a database access error occurs; this method is called on a closed
     *                <code>PreparedStatement</code> or the SQL statement returns a <code>ResultSet</code> object
     */
    public int executeUpdate() throws SQLException {
        return currentPreparedStatement.executeUpdate();
    }

    /**
     * Sets the designated parameter to SQL <code>NULL</code>.
     * 
     * <P>
     * <B>Note:</B> You must specify the parameter's SQL type.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param sqlType the SQL type code defined in <code>java.sql.Types</code>
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setNull(int parameterIndex, int sqlType) throws SQLException {
        currentPreparedStatement.setNull(parameterIndex, sqlType);
    }

    /**
     * Sets the designated parameter to the given Java <code>boolean</code> value. The driver converts this to an SQL
     * <code>BIT</code> or <code>BOOLEAN</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setBoolean(int parameterIndex, boolean x) throws SQLException {
        currentPreparedStatement.setBoolean(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java <code>byte</code> value. The driver converts this to an SQL
     * <code>TINYINT</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setByte(int parameterIndex, byte x) throws SQLException {
        currentPreparedStatement.setByte(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java <code>short</code> value. The driver converts this to an SQL
     * <code>SMALLINT</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setShort(int parameterIndex, short x) throws SQLException {
        currentPreparedStatement.setShort(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java <code>int</code> value. The driver converts this to an SQL
     * <code>INTEGER</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setInt(int parameterIndex, int x) throws SQLException {
        currentPreparedStatement.setInt(parameterIndex, x);

    }

    /**
     * Sets the designated parameter to the given Java <code>long</code> value. The driver converts this to an SQL
     * <code>BIGINT</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setLong(int parameterIndex, long x) throws SQLException {
        currentPreparedStatement.setLong(parameterIndex, x);

    }

    /**
     * Sets the designated parameter to the given Java <code>float</code> value. The driver converts this to an SQL
     * <code>REAL</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setFloat(int parameterIndex, float x) throws SQLException {
        currentPreparedStatement.setFloat(parameterIndex, x);

    }

    /**
     * Sets the designated parameter to the given Java <code>double</code> value. The driver converts this to an SQL
     * <code>DOUBLE</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setDouble(int parameterIndex, double x) throws SQLException {
        currentPreparedStatement.setDouble(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.math.BigDecimal</code> value. The driver converts this to
     * an SQL <code>NUMERIC</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setBigDecimal(int parameterIndex, BigDecimal x) throws SQLException {
        currentPreparedStatement.setBigDecimal(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java <code>String</code> value. The driver converts this to an SQL
     * <code>VARCHAR</code> or <code>LONGVARCHAR</code> value (depending on the argument's size relative to the driver's
     * limits on <code>VARCHAR</code> values) when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setString(int parameterIndex, String x) throws SQLException {
        currentPreparedStatement.setString(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java array of bytes. The driver converts this to an SQL
     * <code>VARBINARY</code> or <code>LONGVARBINARY</code> (depending on the argument's size relative to the driver's
     * limits on <code>VARBINARY</code> values) when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setBytes(int parameterIndex, byte[] x) throws SQLException {
        currentPreparedStatement.setBytes(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Date</code> value using the default time zone of the
     * virtual machine that is running the application. The driver converts this to an SQL <code>DATE</code> value when
     * it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setDate(int parameterIndex, Date x) throws SQLException {
        currentPreparedStatement.setDate(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Time</code> value. The driver converts this to an SQL
     * <code>TIME</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setTime(int parameterIndex, Time x) throws SQLException {
        currentPreparedStatement.setTime(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Timestamp</code> value. The driver converts this to an
     * SQL <code>TIMESTAMP</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setTimestamp(int parameterIndex, Timestamp x) throws SQLException {
        currentPreparedStatement.setTimestamp(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given input stream, which will have the specified number of bytes. When a
     * very large ASCII value is input to a <code>LONGVARCHAR</code> parameter, it may be more practical to send it via
     * a <code>java.io.InputStream</code>. Data will be read from the stream as needed until end-of-file is reached. The
     * JDBC driver will do any necessary conversion from ASCII to the database char format.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the Java input stream that contains the ASCII parameter value
     * @param length the number of bytes in the stream
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setAsciiStream(int parameterIndex, InputStream x, int length) throws SQLException {
        currentPreparedStatement.setAsciiStream(parameterIndex, x, length);

    }

    /**
     * Sets the designated parameter to the given input stream, which will have the specified number of bytes.
     * 
     * When a very large Unicode value is input to a <code>LONGVARCHAR</code> parameter, it may be more practical to
     * send it via a <code>java.io.InputStream</code> object. The data will be read from the stream as needed until
     * end-of-file is reached. The JDBC driver will do any necessary conversion from Unicode to the database char
     * format.
     * 
     * The byte format of the Unicode stream must be a Java UTF-8, as defined in the Java Virtual Machine Specification.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x a <code>java.io.InputStream</code> object that contains the Unicode parameter value
     * @param length the number of bytes in the stream
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @deprecated
     */
    @Deprecated
    public void setUnicodeStream(int parameterIndex, InputStream x, int length) throws SQLException {
        currentPreparedStatement.setUnicodeStream(parameterIndex, x, length);
    }

    /**
     * Sets the designated parameter to the given input stream, which will have the specified number of bytes. When a
     * very large binary value is input to a <code>LONGVARBINARY</code> parameter, it may be more practical to send it
     * via a <code>java.io.InputStream</code> object. The data will be read from the stream as needed until end-of-file
     * is reached.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the java input stream which contains the binary parameter value
     * @param length the number of bytes in the stream
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     */
    public void setBinaryStream(int parameterIndex, InputStream x, int length) throws SQLException {
        currentPreparedStatement.setBinaryStream(parameterIndex, x, length);
    }

    /**
     * Clears the current parameter values immediately.
     * <P>
     * In general, parameter values remain in force for repeated use of a statement. Setting a parameter value
     * automatically clears its previous value. However, in some cases it is useful to immediately release the resources
     * used by the current parameter values; this can be done by calling the method <code>clearParameters</code>.
     * 
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>PreparedStatement</code>
     */
    public void clearParameters() throws SQLException {
        currentPreparedStatement.clearParameters();
    }

    /**
     * Sets the value of the designated parameter with the given object. This method is like the method
     * <code>setObject</code> above, except that it assumes a scale of zero.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the object containing the input parameter value
     * @param targetSqlType the SQL type (as defined in java.sql.Types) to be sent to the database
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @see Types
     */
    public void setObject(int parameterIndex, Object x, int targetSqlType) throws SQLException {
        currentPreparedStatement.setObject(parameterIndex, x, targetSqlType);
    }

    /**
     * <p>
     * Sets the value of the designated parameter using the given object. The second parameter must be of type
     * <code>Object</code>; therefore, the <code>java.lang</code> equivalent objects should be used for built-in types.
     * 
     * <p>
     * The JDBC specification specifies a standard mapping from Java <code>Object</code> types to SQL types. The given
     * argument will be converted to the corresponding SQL type before being sent to the database.
     * 
     * <p>
     * Note that this method may be used to pass datatabase- specific abstract data types, by using a driver-specific
     * Java type.
     * 
     * If the object is of a class implementing the interface <code>SQLData</code>, the JDBC driver should call the
     * method <code>SQLData.writeSQL</code> to write it to the SQL data stream. If, on the other hand, the object is of
     * a class implementing <code>Ref</code>, <code>Blob</code>, <code>Clob</code>, <code>NClob</code>,
     * <code>Struct</code>, <code>java.net.URL</code>, <code>RowId</code>, <code>SQLXML</code> or <code>Array</code>,
     * the driver should pass it to the database as a value of the corresponding SQL type.
     * <P>
     * <b>Note:</b> Not all databases allow for a non-typed Null to be sent to the backend. For maximum portability, the
     * <code>setNull</code> or the <code>setObject(int parameterIndex, Object x, int sqlType)</code> method should be
     * used instead of <code>setObject(int parameterIndex, Object x)</code>.
     * <p>
     * <b>Note:</b> This method throws an exception if there is an ambiguity, for example, if the object is of a class
     * implementing more than one of the interfaces named above.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the object containing the input parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs; this method is called on a closed <code>PreparedStatement</code> or
     *                the type of the given object is ambiguous
     */
    public void setObject(int parameterIndex, Object x) throws SQLException {
        currentPreparedStatement.setObject(parameterIndex, x);
    }

    /**
     * Executes the SQL statement in this <code>PreparedStatement</code> object, which may be any kind of SQL statement.
     * Some prepared statements return multiple results; the <code>execute</code> method handles these complex
     * statements as well as the simpler form of statements handled by the methods <code>executeQuery</code> and
     * <code>executeUpdate</code>.
     * <P>
     * The <code>execute</code> method returns a <code>boolean</code> to indicate the form of the first result. You must
     * call either the method <code>getResultSet</code> or <code>getUpdateCount</code> to retrieve the result; you must
     * call <code>getMoreResults</code> to move to any subsequent result(s).
     * 
     * @return <code>true</code> if the first result is a <code>ResultSet</code> object; <code>false</code> if the first
     *         result is an update count or there is no result
     * @exception SQLException if a database access error occurs; this method is called on a closed
     *                <code>PreparedStatement</code> or an argument is supplied to this method
     * @see Statement#execute
     * @see Statement#getResultSet
     * @see Statement#getUpdateCount
     * @see Statement#getMoreResults
     */
    public boolean execute() throws SQLException {
        return currentPreparedStatement.execute();
    }

    /**
     * Adds a set of parameters to this <code>PreparedStatement</code> object's batch of commands.
     * 
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>PreparedStatement</code>
     * @see Statement#addBatch
     * @since 1.2
     */
    public void addBatch() throws SQLException {
        currentPreparedStatement.addBatch();
    }

    /**
     * Sets the designated parameter to the given <code>Reader</code> object, which is the given number of characters
     * long. When a very large UNICODE value is input to a <code>LONGVARCHAR</code> parameter, it may be more practical
     * to send it via a <code>java.io.Reader</code> object. The data will be read from the stream as needed until
     * end-of-file is reached. The JDBC driver will do any necessary conversion from UNICODE to the database char
     * format.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param reader the <code>java.io.Reader</code> object that contains the Unicode data
     * @param length the number of characters in the stream
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setCharacterStream(int parameterIndex, Reader reader, int length) throws SQLException {
        currentPreparedStatement.setCharacterStream(parameterIndex, reader, length);
    }

    /**
     * Sets the designated parameter to the given <code>REF(&lt;structured-type&gt;)</code> value. The driver converts
     * this to an SQL <code>REF</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x an SQL <code>REF</code> value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setRef(int parameterIndex, Ref x) throws SQLException {
        currentPreparedStatement.setRef(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Blob</code> object. The driver converts this to an SQL
     * <code>BLOB</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x a <code>Blob</code> object that maps an SQL <code>BLOB</code> value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setBlob(int parameterIndex, Blob x) throws SQLException {
        currentPreparedStatement.setBlob(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Clob</code> object. The driver converts this to an SQL
     * <code>CLOB</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x a <code>Clob</code> object that maps an SQL <code>CLOB</code> value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setClob(int parameterIndex, Clob x) throws SQLException {
        currentPreparedStatement.setClob(parameterIndex, x);

    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Array</code> object. The driver converts this to an SQL
     * <code>ARRAY</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x an <code>Array</code> object that maps an SQL <code>ARRAY</code> value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setArray(int parameterIndex, Array x) throws SQLException {
        currentPreparedStatement.setArray(parameterIndex, x);

    }

    /**
     * Retrieves a <code>ResultSetMetaData</code> object that contains information about the columns of the
     * <code>ResultSet</code> object that will be returned when this <code>PreparedStatement</code> object is executed.
     * <P>
     * Because a <code>PreparedStatement</code> object is precompiled, it is possible to know about the
     * <code>ResultSet</code> object that it will return without having to execute it. Consequently, it is possible to
     * invoke the method <code>getMetaData</code> on a <code>PreparedStatement</code> object rather than waiting to
     * execute it and then invoking the <code>ResultSet.getMetaData</code> method on the <code>ResultSet</code> object
     * that is returned.
     * <P>
     * <B>NOTE:</B> Using this method may be expensive for some drivers due to the lack of underlying DBMS support.
     * 
     * @return the description of a <code>ResultSet</code> object's columns or <code>null</code> if the driver cannot
     *         return a <code>ResultSetMetaData</code> object
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>PreparedStatement</code>
     * @since 1.2
     */
    public ResultSetMetaData getMetaData() throws SQLException {
        return currentPreparedStatement.getMetaData();
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Date</code> value, using the given
     * <code>Calendar</code> object. The driver uses the <code>Calendar</code> object to construct an SQL
     * <code>DATE</code> value, which the driver then sends to the database. With a <code>Calendar</code> object, the
     * driver can calculate the date taking into account a custom timezone. If no <code>Calendar</code> object is
     * specified, the driver uses the default timezone, which is that of the virtual machine running the application.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @param cal the <code>Calendar</code> object the driver will use to construct the date
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setDate(int parameterIndex, Date x, Calendar cal) throws SQLException {
        currentPreparedStatement.setDate(parameterIndex, x, cal);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Time</code> value, using the given
     * <code>Calendar</code> object. The driver uses the <code>Calendar</code> object to construct an SQL
     * <code>TIME</code> value, which the driver then sends to the database. With a <code>Calendar</code> object, the
     * driver can calculate the time taking into account a custom timezone. If no <code>Calendar</code> object is
     * specified, the driver uses the default timezone, which is that of the virtual machine running the application.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @param cal the <code>Calendar</code> object the driver will use to construct the time
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setTime(int parameterIndex, Time x, Calendar cal) throws SQLException {
        currentPreparedStatement.setTime(parameterIndex, x, cal);

    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Timestamp</code> value, using the given
     * <code>Calendar</code> object. The driver uses the <code>Calendar</code> object to construct an SQL
     * <code>TIMESTAMP</code> value, which the driver then sends to the database. With a <code>Calendar</code> object,
     * the driver can calculate the timestamp taking into account a custom timezone. If no <code>Calendar</code> object
     * is specified, the driver uses the default timezone, which is that of the virtual machine running the application.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @param cal the <code>Calendar</code> object the driver will use to construct the timestamp
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setTimestamp(int parameterIndex, Timestamp x, Calendar cal) throws SQLException {
        currentPreparedStatement.setTimestamp(parameterIndex, x, cal);

    }

    /**
     * Sets the designated parameter to SQL <code>NULL</code>. This version of the method <code>setNull</code> should be
     * used for user-defined types and REF type parameters. Examples of user-defined types include: STRUCT, DISTINCT,
     * JAVA_OBJECT, and named array types.
     * 
     * <P>
     * <B>Note:</B> To be portable, applications must give the SQL type code and the fully-qualified SQL type name when
     * specifying a NULL user-defined or REF parameter. In the case of a user-defined type the name is the type name of
     * the parameter itself. For a REF parameter, the name is the type name of the referenced type. If a JDBC driver
     * does not need the type code or type name information, it may ignore it.
     * 
     * Although it is intended for user-defined and Ref parameters, this method may be used to set a null parameter of
     * any JDBC type. If the parameter does not have a user-defined or REF type, the given typeName is ignored.
     * 
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param sqlType a value from <code>java.sql.Types</code>
     * @param typeName the fully-qualified name of an SQL user-defined type; ignored if the parameter is not a
     *            user-defined type or REF
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.2
     */
    public void setNull(int parameterIndex, int sqlType, String typeName) throws SQLException {
        currentPreparedStatement.setNull(parameterIndex, sqlType, typeName);

    }

    /**
     * Sets the designated parameter to the given <code>java.net.URL</code> value. The driver converts this to an SQL
     * <code>DATALINK</code> value when it sends it to the database.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the <code>java.net.URL</code> object to be set
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.4
     */
    public void setURL(int parameterIndex, URL x) throws SQLException {
        currentPreparedStatement.setURL(parameterIndex, x);

    }

    /**
     * Retrieves the number, types and properties of this <code>PreparedStatement</code> object's parameters.
     * 
     * @return a <code>ParameterMetaData</code> object that contains information about the number, types and properties
     *         for each parameter marker of this <code>PreparedStatement</code> object
     * @exception SQLException if a database access error occurs or this method is called on a closed
     *                <code>PreparedStatement</code>
     * @see ParameterMetaData
     * @since 1.4
     */
    public ParameterMetaData getParameterMetaData() throws SQLException {
        return currentPreparedStatement.getParameterMetaData();
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.RowId</code> object. The driver converts this to a SQL
     * <code>ROWID</code> value when it sends it to the database
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *             database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * 
     * @since 1.6
     */
    public void setRowId(int parameterIndex, RowId x) throws SQLException {
        currentPreparedStatement.setRowId(parameterIndex, x);
    }

    /**
     * Sets the designated paramter to the given <code>String</code> object. The driver converts this to a SQL
     * <code>NCHAR</code> or <code>NVARCHAR</code> or <code>LONGNVARCHAR</code> value (depending on the argument's size
     * relative to the driver's limits on <code>NVARCHAR</code> values) when it sends it to the database.
     * 
     * @param parameterIndex of the first parameter is 1, the second is 2, ...
     * @param value the parameter value
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if the
     *             driver does not support national character sets; if the driver can detect that a data conversion
     *             error could occur; if a database access error occurs; or this method is called on a closed
     *             <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setNString(int parameterIndex, String value) throws SQLException {
        currentPreparedStatement.setNString(parameterIndex, value);

    }

    /**
     * Sets the designated parameter to a <code>Reader</code> object. The <code>Reader</code> reads the data till
     * end-of-file is reached. The driver does the necessary conversion from Java character format to the national
     * character set in the database.
     * 
     * @param parameterIndex of the first parameter is 1, the second is 2, ...
     * @param value the parameter value
     * @param length the number of characters in the parameter data.
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if the
     *             driver does not support national character sets; if the driver can detect that a data conversion
     *             error could occur; if a database access error occurs; or this method is called on a closed
     *             <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setNCharacterStream(int parameterIndex, Reader value, long length) throws SQLException {
        currentPreparedStatement.setNCharacterStream(parameterIndex, value, length);

    }

    /**
     * Sets the designated parameter to a <code>java.sql.NClob</code> object. The driver converts this to a SQL
     * <code>NCLOB</code> value when it sends it to the database.
     * 
     * @param parameterIndex of the first parameter is 1, the second is 2, ...
     * @param value the parameter value
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if the
     *             driver does not support national character sets; if the driver can detect that a data conversion
     *             error could occur; if a database access error occurs; or this method is called on a closed
     *             <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setNClob(int parameterIndex, NClob value) throws SQLException {
        currentPreparedStatement.setNClob(parameterIndex, value);
    }

    /**
     * Sets the designated parameter to a <code>Reader</code> object. The reader must contain the number of characters
     * specified by length otherwise a <code>SQLException</code> will be generated when the
     * <code>PreparedStatement</code> is executed. This method differs from the
     * <code>setCharacterStream (int, Reader, int)</code> method because it informs the driver that the parameter value
     * should be sent to the server as a <code>CLOB</code>. When the <code>setCharacterStream</code> method is used, the
     * driver may have to do extra work to determine whether the parameter data should be sent to the server as a
     * <code>LONGVARCHAR</code> or a <code>CLOB</code>
     * 
     * @param parameterIndex index of the first parameter is 1, the second is 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @param length the number of characters in the parameter data.
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *             database access error occurs; this method is called on a closed <code>PreparedStatement</code> or if
     *             the length specified is less than zero.
     * @since 1.6
     */
    public void setClob(int parameterIndex, Reader reader, long length) throws SQLException {
        currentPreparedStatement.setClob(parameterIndex, reader, length);

    }

    /**
     * Sets the designated parameter to a <code>InputStream</code> object. The inputstream must contain the number of
     * characters specified by length otherwise a <code>SQLException</code> will be generated when the
     * <code>PreparedStatement</code> is executed. This method differs from the
     * <code>setBinaryStream (int, InputStream, int)</code> method because it informs the driver that the parameter
     * value should be sent to the server as a <code>BLOB</code>. When the <code>setBinaryStream</code> method is used,
     * the driver may have to do extra work to determine whether the parameter data should be sent to the server as a
     * <code>LONGVARBINARY</code> or a <code>BLOB</code>
     * 
     * @param parameterIndex index of the first parameter is 1, the second is 2, ...
     * @param inputStream An object that contains the data to set the parameter value to.
     * @param length the number of bytes in the parameter data.
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *             database access error occurs; this method is called on a closed <code>PreparedStatement</code>; if
     *             the length specified is less than zero or if the number of bytes in the inputstream does not match
     *             the specfied length.
     * 
     * @since 1.6
     */
    public void setBlob(int parameterIndex, InputStream inputStream, long length) throws SQLException {
        currentPreparedStatement.setBlob(parameterIndex, inputStream, length);

    }

    /**
     * Sets the designated parameter to a <code>Reader</code> object. The reader must contain the number of characters
     * specified by length otherwise a <code>SQLException</code> will be generated when the
     * <code>PreparedStatement</code> is executed. This method differs from the
     * <code>setCharacterStream (int, Reader, int)</code> method because it informs the driver that the parameter value
     * should be sent to the server as a <code>NCLOB</code>. When the <code>setCharacterStream</code> method is used,
     * the driver may have to do extra work to determine whether the parameter data should be sent to the server as a
     * <code>LONGNVARCHAR</code> or a <code>NCLOB</code>
     * 
     * @param parameterIndex index of the first parameter is 1, the second is 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @param length the number of characters in the parameter data.
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if the
     *             length specified is less than zero; if the driver does not support national character sets; if the
     *             driver can detect that a data conversion error could occur; if a database access error occurs or this
     *             method is called on a closed <code>PreparedStatement</code>
     * 
     * @since 1.6
     */
    public void setNClob(int parameterIndex, Reader reader, long length) throws SQLException {
        currentPreparedStatement.setNClob(parameterIndex, reader, length);

    }

    /**
     * Sets the designated parameter to the given <code>java.sql.SQLXML</code> object. The driver converts this to an
     * SQL <code>XML</code> value when it sends it to the database.
     * <p>
     * 
     * @param parameterIndex index of the first parameter is 1, the second is 2, ...
     * @param xmlObject a <code>SQLXML</code> object that maps an SQL <code>XML</code> value
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *             database access error occurs; this method is called on a closed <code>PreparedStatement</code> or the
     *             <code>java.xml.transform.Result</code>, <code>Writer</code> or <code>OutputStream</code> has not been
     *             closed for the <code>SQLXML</code> object
     * 
     * @since 1.6
     */
    public void setSQLXML(int parameterIndex, SQLXML xmlObject) throws SQLException {
        currentPreparedStatement.setSQLXML(parameterIndex, xmlObject);

    }

    /**
     * <p>
     * Sets the value of the designated parameter with the given object. The second argument must be an object type; for
     * integral values, the <code>java.lang</code> equivalent objects should be used.
     * 
     * If the second argument is an <code>InputStream</code> then the stream must contain the number of bytes specified
     * by scaleOrLength. If the second argument is a <code>Reader</code> then the reader must contain the number of
     * characters specified by scaleOrLength. If these conditions are not true the driver will generate a
     * <code>SQLException</code> when the prepared statement is executed.
     * 
     * <p>
     * The given Java object will be converted to the given targetSqlType before being sent to the database.
     * 
     * If the object has a custom mapping (is of a class implementing the interface <code>SQLData</code>), the JDBC
     * driver should call the method <code>SQLData.writeSQL</code> to write it to the SQL data stream. If, on the other
     * hand, the object is of a class implementing <code>Ref</code>, <code>Blob</code>, <code>Clob</code>,
     * <code>NClob</code>, <code>Struct</code>, <code>java.net.URL</code>, or <code>Array</code>, the driver should pass
     * it to the database as a value of the corresponding SQL type.
     * 
     * <p>
     * Note that this method may be used to pass database-specific abstract data types.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the object containing the input parameter value
     * @param targetSqlType the SQL type (as defined in java.sql.Types) to be sent to the database. The scale argument
     *            may further qualify this type.
     * @param scaleOrLength for <code>java.sql.Types.DECIMAL</code> or <code>java.sql.Types.NUMERIC types</code>, this
     *            is the number of digits after the decimal point. For Java Object types <code>InputStream</code> and
     *            <code>Reader</code>, this is the length of the data in the stream or reader. For all other types, this
     *            value will be ignored.
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs; this method is called on a closed <code>PreparedStatement</code> or
     *                if the Java Object specified by x is an InputStream or Reader object and the value of the scale
     *                parameter is less than zero
     * @see Types
     * 
     * @since 1.6
     */
    public void setObject(int parameterIndex, Object x, int targetSqlType, int scaleOrLength) throws SQLException {
        currentPreparedStatement.setObject(parameterIndex, x, targetSqlType, scaleOrLength);

    }

    /**
     * Sets the designated parameter to the given input stream, which will have the specified number of bytes. When a
     * very large ASCII value is input to a <code>LONGVARCHAR</code> parameter, it may be more practical to send it via
     * a <code>java.io.InputStream</code>. Data will be read from the stream as needed until end-of-file is reached. The
     * JDBC driver will do any necessary conversion from ASCII to the database char format.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the Java input stream that contains the ASCII parameter value
     * @param length the number of bytes in the stream
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setAsciiStream(int parameterIndex, InputStream x, long length) throws SQLException {
        currentPreparedStatement.setAsciiStream(parameterIndex, x, length);

    }

    /**
     * Sets the designated parameter to the given input stream, which will have the specified number of bytes. When a
     * very large binary value is input to a <code>LONGVARBINARY</code> parameter, it may be more practical to send it
     * via a <code>java.io.InputStream</code> object. The data will be read from the stream as needed until end-of-file
     * is reached.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the java input stream which contains the binary parameter value
     * @param length the number of bytes in the stream
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setBinaryStream(int parameterIndex, InputStream x, long length) throws SQLException {
        currentPreparedStatement.setBinaryStream(parameterIndex, x, length);

    }

    /**
     * Sets the designated parameter to the given <code>Reader</code> object, which is the given number of characters
     * long. When a very large UNICODE value is input to a <code>LONGVARCHAR</code> parameter, it may be more practical
     * to send it via a <code>java.io.Reader</code> object. The data will be read from the stream as needed until
     * end-of-file is reached. The JDBC driver will do any necessary conversion from UNICODE to the database char
     * format.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param reader the <code>java.io.Reader</code> object that contains the Unicode data
     * @param length the number of characters in the stream
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setCharacterStream(int parameterIndex, Reader reader, long length) throws SQLException {
        currentPreparedStatement.setCharacterStream(parameterIndex, reader, length);

    }

    /**
     * Sets the designated parameter to the given input stream. When a very large ASCII value is input to a
     * <code>LONGVARCHAR</code> parameter, it may be more practical to send it via a <code>java.io.InputStream</code>.
     * Data will be read from the stream as needed until end-of-file is reached. The JDBC driver will do any necessary
     * conversion from ASCII to the database char format.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * <P>
     * <B>Note:</B> Consult your JDBC driver documentation to determine if it might be more efficient to use a version
     * of <code>setAsciiStream</code> which takes a length parameter.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the Java input stream that contains the ASCII parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setAsciiStream(int parameterIndex, InputStream x) throws SQLException {
        currentPreparedStatement.setAsciiStream(parameterIndex, x);

    }

    /**
     * Sets the designated parameter to the given input stream. When a very large binary value is input to a
     * <code>LONGVARBINARY</code> parameter, it may be more practical to send it via a <code>java.io.InputStream</code>
     * object. The data will be read from the stream as needed until end-of-file is reached.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * <P>
     * <B>Note:</B> Consult your JDBC driver documentation to determine if it might be more efficient to use a version
     * of <code>setBinaryStream</code> which takes a length parameter.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the java input stream which contains the binary parameter value
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setBinaryStream(int parameterIndex, InputStream x) throws SQLException {
        currentPreparedStatement.setBinaryStream(parameterIndex, x);

    }

    /**
     * Sets the designated parameter to the given <code>Reader</code> object. When a very large UNICODE value is input
     * to a <code>LONGVARCHAR</code> parameter, it may be more practical to send it via a <code>java.io.Reader</code>
     * object. The data will be read from the stream as needed until end-of-file is reached. The JDBC driver will do any
     * necessary conversion from UNICODE to the database char format.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * <P>
     * <B>Note:</B> Consult your JDBC driver documentation to determine if it might be more efficient to use a version
     * of <code>setCharacterStream</code> which takes a length parameter.
     * 
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param reader the <code>java.io.Reader</code> object that contains the Unicode data
     * @exception SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *                database access error occurs or this method is called on a closed <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setCharacterStream(int parameterIndex, Reader reader) throws SQLException {
        currentPreparedStatement.setCharacterStream(parameterIndex, reader);

    }

    /**
     * Sets the designated parameter to a <code>Reader</code> object. The <code>Reader</code> reads the data till
     * end-of-file is reached. The driver does the necessary conversion from Java character format to the national
     * character set in the database.
     * 
     * <P>
     * <B>Note:</B> This stream object can either be a standard Java stream object or your own subclass that implements
     * the standard interface.
     * <P>
     * <B>Note:</B> Consult your JDBC driver documentation to determine if it might be more efficient to use a version
     * of <code>setNCharacterStream</code> which takes a length parameter.
     * 
     * @param parameterIndex of the first parameter is 1, the second is 2, ...
     * @param value the parameter value
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if the
     *             driver does not support national character sets; if the driver can detect that a data conversion
     *             error could occur; if a database access error occurs; or this method is called on a closed
     *             <code>PreparedStatement</code>
     * @since 1.6
     */
    public void setNCharacterStream(int parameterIndex, Reader value) throws SQLException {
        currentPreparedStatement.setNCharacterStream(parameterIndex, value);
    }

    /**
     * Sets the designated parameter to a <code>Reader</code> object. This method differs from the
     * <code>setCharacterStream (int, Reader)</code> method because it informs the driver that the parameter value
     * should be sent to the server as a <code>CLOB</code>. When the <code>setCharacterStream</code> method is used, the
     * driver may have to do extra work to determine whether the parameter data should be sent to the server as a
     * <code>LONGVARCHAR</code> or a <code>CLOB</code>
     * 
     * <P>
     * <B>Note:</B> Consult your JDBC driver documentation to determine if it might be more efficient to use a version
     * of <code>setClob</code> which takes a length parameter.
     * 
     * @param parameterIndex index of the first parameter is 1, the second is 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *             database access error occurs; this method is called on a closed <code>PreparedStatement</code>or if
     *             parameterIndex does not correspond to a parameter marker in the SQL statement
     * @since 1.6
     */
    public void setClob(int parameterIndex, Reader reader) throws SQLException {
        currentPreparedStatement.setClob(parameterIndex, reader);

    }

    /**
     * Sets the designated parameter to a <code>InputStream</code> object. This method differs from the
     * <code>setBinaryStream (int, InputStream)</code> method because it informs the driver that the parameter value
     * should be sent to the server as a <code>BLOB</code>. When the <code>setBinaryStream</code> method is used, the
     * driver may have to do extra work to determine whether the parameter data should be sent to the server as a
     * <code>LONGVARBINARY</code> or a <code>BLOB</code>
     * 
     * <P>
     * <B>Note:</B> Consult your JDBC driver documentation to determine if it might be more efficient to use a version
     * of <code>setBlob</code> which takes a length parameter.
     * 
     * @param parameterIndex index of the first parameter is 1, the second is 2, ...
     * @param inputStream An object that contains the data to set the parameter value to.
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if a
     *             database access error occurs; this method is called on a closed <code>PreparedStatement</code> or if
     *             parameterIndex does not correspond to a parameter marker in the SQL statement,
     * 
     * @since 1.6
     */
    public void setBlob(int parameterIndex, InputStream inputStream) throws SQLException {
        currentPreparedStatement.setBlob(parameterIndex, inputStream);

    }

    /**
     * Sets the designated parameter to a <code>Reader</code> object. This method differs from the
     * <code>setCharacterStream (int, Reader)</code> method because it informs the driver that the parameter value
     * should be sent to the server as a <code>NCLOB</code>. When the <code>setCharacterStream</code> method is used,
     * the driver may have to do extra work to determine whether the parameter data should be sent to the server as a
     * <code>LONGNVARCHAR</code> or a <code>NCLOB</code>
     * <P>
     * <B>Note:</B> Consult your JDBC driver documentation to determine if it might be more efficient to use a version
     * of <code>setNClob</code> which takes a length parameter.
     * 
     * @param parameterIndex index of the first parameter is 1, the second is 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @throws SQLException if parameterIndex does not correspond to a parameter marker in the SQL statement; if the
     *             driver does not support national character sets; if the driver can detect that a data conversion
     *             error could occur; if a database access error occurs or this method is called on a closed
     *             <code>PreparedStatement</code>
     * 
     * @since 1.6
     */
    public void setNClob(int parameterIndex, Reader reader) throws SQLException {
        currentPreparedStatement.setNClob(parameterIndex, reader);

    }

    /**
     * 执行结束后关闭连接
     * 
     * @exception SQLException SQL异常
     * @see java.sql.Statement#closeOnCompletion()
     */
    @Override
    public void closeOnCompletion() throws SQLException {
        // TODO Auto-generated method stub

    }

    /**
     * 是否关闭连接
     * 
     * @return 布尔值
     * @exception SQLException SQL异常
     * @see java.sql.Statement#isCloseOnCompletion()
     */
    @Override
    public boolean isCloseOnCompletion() throws SQLException {
        // TODO Auto-generated method stub
        return false;
    }

}
